(15c) Constrained Model Identification - Use Knowledge of the Process to Get Better Models From Less Data
AIChE Spring Meeting and Global Congress on Process Safety
2010
2010 Spring Meeting & 6th Global Congress on Process Safety
13th Topical on Refinery Processing
Model Predictive Control (MPC) I
Monday, March 22, 2010 - 9:00am to 9:30am
Accurate dynamic process response models are a key element in a successful refining MPC application. For most refinery processes, these response models are derived from data obtained during a specially designed plant test where the process independent variables is excited to cause movement in the MPC application dependent variables.
Typically, the derived responses are not suitable for use in a controller without applying some post identification modifications to ensure the resulting model represents the target process well. These modifications can include: 1) Enforcing Gain and dead time constraints on specific responses. 2) Enforcing collinear gain relationships between related responses such as a product analyser and an associated pressure compensated temperature. 3) Removal of inverse process responses where these are judged to be infeasible. 4) Development of variable transformations to better match the response data.
This paper describes how the above post identification modifications can be input as constraints to model identification phase. Approaching the problem in this way shortens the model development time and results in better models from less data. A side benefit is that future revamps of the controller are easier as the control engineers expertise is retained within the model identification package.
Checkout
This paper has an Extended Abstract file available; you must purchase the conference proceedings to access it.
Do you already own this?
Log In for instructions on accessing this content.
Pricing
Individuals
2010 Spring Meeting & 6th Global Congress on Process Safety
AIChE Pro Members | $150.00 |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $225.00 |
Non-Members | $225.00 |
13th Topical on Refinery Processing only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |